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Pay, the Night Tube service and closing offices are reasons for the strike action the union said

"RMT also remains in dispute over station staffing and the week of action on that issue, scheduled to begin from the seventh of February, also remains on and the union is finalising the details for the continuation of that industrial campaign and the on-going fight over the threat to jobs, services and safety."

The ongoing dispute is over pay, the planned Night Tube and station staffing.

More to follow...

GETTY

The RMT Union is calling for better working conditions when the Night Tube service starts